product is when you multiply 2 numbers
[tex] \frac{4}{7} [/tex] of 28
means you have to multiply
[tex] \frac{4}{7}*28 [/tex]
when multiplying multiply numerators with numerators and denominators by denominators
[tex] \frac{4}{7}*\frac{28}{1} = \frac{x4*28}{7*1} = \frac{112}{7} = 16 [/tex]
the product of the 2 numbers is 16